We use cookies on our site to analyze traffic, enhance your experience, and provide you with tailored content.

For more information visit our privacy policy.

ppm definition

ppm means parts per million.
ppm means parts per million;
ppm means parts per million by weight.

More Definitions of ppm

ppm means an abbreviation for parts per million, the unit of measurement used in chemical testing which indicates the parts by weight in relation to one million parts by weight of water, such as the term milligrams per liter (mg/L).
ppm means parts per million by volume unless otherwise specified in the applicable rule or an individual permit. It is a dimensionless unit of measurement for gases that expresses the ratio of the volume of one component gas to the volume of the entire sample mixture of gases.
ppm means ml/m3.
ppm or “Public Performance Measure” means the public performance measure as produced and/or published by Network Rail;